Add hints for potential overlay promotion on android.

cc/output/direct_renderer.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_OUTPUT_DIRECT_RENDERER_H_
 #define CC_OUTPUT_DIRECT_RENDERER_H_
 
 #include <memory>
 #include <unordered_map>
 
@@ skipping 155 matching lines @@
   virtual void EnsureScissorTestDisabled() = 0;
   virtual void DidChangeVisibility() = 0;
   virtual void CopyCurrentRenderPassToBitmap(
       DrawingFrame* frame,
       std::unique_ptr<CopyOutputRequest> request) = 0;
 
   gfx::Size surface_size_for_swap_buffers() const {
     return reshape_surface_size_;
   }
 
+  bool IsResourcePromotable(ResourceId resource_id);
+
   const RendererSettings* const settings_;
   OutputSurface* const output_surface_;
   ResourceProvider* const resource_provider_;
   // This can be replaced by test implementations.
   std::unique_ptr<OverlayProcessor> overlay_processor_;
 
   // Whether it's valid to SwapBuffers with an empty rect. Trivially true when
   // using partial swap.
   bool allow_empty_swap_;
   // Whether partial swap can be used.
@@ skipping 28 matching lines @@
   float reshape_device_scale_factor_ = 0.f;
   gfx::ColorSpace reshape_device_color_space_;
   bool reshape_has_alpha_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(DirectRenderer);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_DIRECT_RENDERER_H_